/* create a new cache for given file.
returns true if created, false else
can destroy an other one if no place available */
Cache *cache_create(const char *file, unsigned int size) {
int i;
Cache *tmp=NULL;
mylog("cache_create(%s, %u)\n", file, size);
/* search a free cache */
for(i=0; i<CACHE_MAX; i++) {
if (caches[i].name == NULL) {
tmp = &(caches[i]);
break;
}
}
if (tmp == NULL) {
/* not found. destroy the oldest cache */
tmp = cache_oldest();
if (tmp == NULL) {
/* should not occur */
return(NULL);
}
}
/* initialise common cache data */
tmp->name = strdup(file);
tmp->created = tmp->last_use = (unsigned int)time(NULL);
tmp->firstblock = NULL;
for(i=0; i<CACHE_MAX_CHUNK; i++)
tmp->chunks[i] = NULL;
tmp->size = size;
/* alocate 'firstblock' to cache_chunksize or size
if smaller (for dl at 'connect') */
tmp->firstblock = malloc(MIN(cache_chunksize, size));
if (tmp->firstblock != NULL) {
tmp->firstblocksize = MIN(cache_chunksize, size);
}
/* just ignore if failed (NULL) as in this case
fistblock will be ignored */
/* creation connection for this file */
mylog("cache_create: connextion cache %p (cnx=%p)\n", tmp, &(tmp->connection));
if (!cache_connect(&(tmp->connection), file,
url_path, tmp->firstblock, MIN(cache_chunksize, size))) {
/* destroy this cache... */
cache_free(tmp);
return(NULL);
}
mylog("cache_create: %p->connection = { %s, %d, %p, %d}\n", tmp,
tmp->connection.target, tmp->connection.type,
tmp->connection.data, tmp->connection.idata);
/* ok */
return(tmp);
}
bool cps_api_get_handle(cps_api_key_t &key, cps_api_channel_t &handle) {
if (cache_connect(key,handle)) {
return true;
}
cps_api_object_owner_reg_t owner;
if (!cps_api_find_owners(&key,owner)) return false;
bool rc = (cps_api_connect_owner(&owner, handle))==cps_api_ret_code_OK;
if (!rc) {
char buff[SCRATCH_LOG_BUFF];
EV_LOG(ERR,DSAPI,0,"NS","Could not connect with owner for %s (%s)",
cps_api_key_print(&key,buff,sizeof(buff)-1),
owner.addr.addr_type== e_std_socket_a_t_STRING ?
owner.addr.address.str: "unk");
}
if (rc) {
fill_cache(&key,owner);
}
return rc;
}
